ST. PETERSBURG, Russia—President Barack Obama fell short in his bid to rally international support for a U.S. military strike on Syria, failing to overcome divisions at a summit of world leaders before flying home to face skeptics in Congress and the American public.

Mr. Obama spent two days coaxing leaders of the Group of 20 nations, pulling presidents and prime ministers aside for private conversations and making his case in a...

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Obama to Discuss Syria Situation Tuesday

In a news conference at the G-20 summit in St. Petersburg, Russia, President Barack Obama said that failure to respond to a chemical weapons attack in Syria would send the wrong signal to rogue nations and terrorist organizations. Obama is expected to discuss Syria on Tuesday. Photo: AP.